US2793128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory compositions and bonding agents therefor
Assignee: PPG Industries Inc
•
Filing: 1955-01-17
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Granted: 1957-05-21
•
Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 Donald E Emhiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:57
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A COMPOSITION COMPRISING A HYDRAULIC-SETTING BONDING AGENT CONSISTING ESSENTIALLY OF A HYDRAULIC-SETTING CALCIUM ALUMINATE AND SODIUM ALUMINATE, SAID SODIUM ALUMINATE CONSTITUTING FROM ABOUT 1 TO 20 PERCENT BY WEIGHT OF THE WEIGHT OF THE HYDRAULIC-SETTING CALCIUM ALUMINATE, SAID SODIUM ALUMINATE INCREASING THE UNFIRED STRENGTH PROVIDED BY SAID HYDRAULIC-SETTING CALCIUM ALUMINATE AS A BONDING AGENT.
Claim 2
Dependent Claim
54 words
A COMPOSITION COMPRISING A HYDRAULIC-SETTING BONDING AGENT CONSISTING ESSENTIALLY OF A HYDRAULIC-SETTING CALCIUM ALUMINATE AND SODIUM ALUMINATE, SAID SODIUM ALUMINATE CONSTITUTING FROM ABOUT 1 TO 20 PERCENT BY WEIGHT OF THE WEIGHT OF THE HYDRAULIC-SETTING CALCIUM ALUMINATE, SAID SODIUM ALUMINATE INCREASING THE UNFIRED STRENGTH PROVIDED BY SAID HYDRAULIC-SETTING CALCIUM ALUMINATE AS A BONDING AGENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |